"Teen years" refers to the period of time between childhood and adulthood, usually from the ages of 13 to 19. It is when a person goes through lots of physical, emotional, and social changes, and begins to develop their own identity. Full definition
Both the internal and external changes during teen years can cause stress on a daily basis. (tacomachristiancounseling.com)
During early teen years, he began struggling with depression and social anxiety, making him feel isolated from his peers. (tacomachristiancounseling.com)
Although uncommon in children, panic attacks are another type of anxiety disorder that does become more common in later teen years. (verywellmind.com)